A person who was seen on surveillance video saving a baby during last year’s mass shooting at a Walmart in Texas that killed 22 people has been identified as a then-homeless man who was living in a makeshift camp near the store, police said.

Spend some time on the campus of the University of Texas at Dallas, and you may see some robots roaming around. They're on a mission: delivering food and snacks to hungry students, staff and faculty — for a $1.99 delivery fee.

Dana Goldstein, a national correspondent for The New York Times, joins us to talk about how a comparison of history textbooks from two states highlights how each state frames history to fit its political climate.